arch/arm/mach-s3c24xx/dma-s3c2410.c

   1 /* linux/arch/arm/mach-s3c2410/dma.c
   2  *
   3  * Copyright (c) 2006 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2410 DMA selection
   7  *
   8  * http://armlinux.simtec.co.uk/
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/device.h>
  18 #include <linux/serial_core.h>
  19 #include <linux/serial_s3c.h>
  20
  21 #include <mach/map.h>
  22 #include <mach/dma.h>
  23
  24 #include <plat/cpu.h>
  25 #include <plat/dma-s3c24xx.h>
  26
  27 #include <mach/regs-gpio.h>
  28 #include <plat/regs-dma.h>
  29 #include <mach/regs-lcd.h>
  30 #include <plat/regs-spi.h>
  31
  32 static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
  33         [DMACH_XD0] = {
  34                 .name           = "xdreq0",
  35                 .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
  36         },
  37         [DMACH_XD1] = {
  38                 .name           = "xdreq1",
  39                 .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
  40         },
  41         [DMACH_SDI] = {
  42                 .name           = "sdi",
  43                 .channels[0]    = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
  44                 .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  45                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  46         },
  47         [DMACH_SPI0] = {
  48                 .name           = "spi0",
  49                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  50         },
  51         [DMACH_SPI1] = {
  52                 .name           = "spi1",
  53                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  54         },
  55         [DMACH_UART0] = {
  56                 .name           = "uart0",
  57                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  58         },
  59         [DMACH_UART1] = {
  60                 .name           = "uart1",
  61                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  62         },
  63         [DMACH_UART2] = {
  64                 .name           = "uart2",
  65                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  66         },
  67         [DMACH_TIMER] = {
  68                 .name           = "timer",
  69                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  70                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  71                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  72         },
  73         [DMACH_I2S_IN] = {
  74                 .name           = "i2s-sdi",
  75                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  76                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  77         },
  78         [DMACH_I2S_OUT] = {
  79                 .name           = "i2s-sdo",
  80                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  81         },
  82         [DMACH_USB_EP1] = {
  83                 .name           = "usb-ep1",
  84                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
  85         },
  86         [DMACH_USB_EP2] = {
  87                 .name           = "usb-ep2",
  88                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
  89         },
  90         [DMACH_USB_EP3] = {
  91                 .name           = "usb-ep3",
  92                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
  93         },
  94         [DMACH_USB_EP4] = {
  95                 .name           = "usb-ep4",
  96                 .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
  97         },
  98 };
  99
 100 static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
 101                                struct s3c24xx_dma_map *map)
 102 {
 103         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 104 }
 105
 106 static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
 107         .select         = s3c2410_dma_select,
 108         .dcon_mask      = 7 << 24,
 109         .map            = s3c2410_dma_mappings,
 110         .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
 111 };
 112
 113 static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
 114         .channels       = {
 115                 [DMACH_SDI]     = {
 116                         .list   = {
 117                                 [0]     = 3 | DMA_CH_VALID,
 118                                 [1]     = 2 | DMA_CH_VALID,
 119                                 [2]     = 0 | DMA_CH_VALID,
 120                         },
 121                 },
 122                 [DMACH_I2S_IN]  = {
 123                         .list   = {
 124                                 [0]     = 1 | DMA_CH_VALID,
 125                                 [1]     = 2 | DMA_CH_VALID,
 126                         },
 127                 },
 128         },
 129 };
 130
 131 static int __init s3c2410_dma_add(struct device *dev,
 132                                   struct subsys_interface *sif)
 133 {
 134         s3c2410_dma_init();
 135         s3c24xx_dma_order_set(&s3c2410_dma_order);
 136         return s3c24xx_dma_init_map(&s3c2410_dma_sel);
 137 }
 138
 139 #if defined(CONFIG_CPU_S3C2410)
 140 static struct subsys_interface s3c2410_dma_interface = {
 141         .name           = "s3c2410_dma",
 142         .subsys         = &s3c2410_subsys,
 143         .add_dev        = s3c2410_dma_add,
 144 };
 145
 146 static int __init s3c2410_dma_drvinit(void)
 147 {
 148         return subsys_interface_register(&s3c2410_dma_interface);
 149 }
 150
 151 arch_initcall(s3c2410_dma_drvinit);
 152
 153 static struct subsys_interface s3c2410a_dma_interface = {
 154         .name           = "s3c2410a_dma",
 155         .subsys         = &s3c2410a_subsys,
 156         .add_dev        = s3c2410_dma_add,
 157 };
 158
 159 static int __init s3c2410a_dma_drvinit(void)
 160 {
 161         return subsys_interface_register(&s3c2410a_dma_interface);
 162 }
 163
 164 arch_initcall(s3c2410a_dma_drvinit);
 165 #endif
 166
 167 #if defined(CONFIG_CPU_S3C2442)
 168 /* S3C2442 DMA contains the same selection table as the S3C2410 */
 169 static struct subsys_interface s3c2442_dma_interface = {
 170         .name           = "s3c2442_dma",
 171         .subsys         = &s3c2442_subsys,
 172         .add_dev        = s3c2410_dma_add,
 173 };
 174
 175 static int __init s3c2442_dma_drvinit(void)
 176 {
 177         return subsys_interface_register(&s3c2442_dma_interface);
 178 }
 179
 180 arch_initcall(s3c2442_dma_drvinit);
 181 #endif
 182